It is not a disgrace to fail. Failing is one of the greatest arts in the world.

here is a great difference between knowing a thing and understanding it. You can know a lot and not really understand anything.

The future can be anything we want it to be, providing we have the faith and that we realize that peace, no less than war, required blood and sweat and tears.

We work day after day, not to finish things; but to make the future better ... because we will spend the rest of our lives there.

If you're doing something the same way you have been doing it for ten years, the chances are you are doing it wrong.

We have a lot of people revolutionizing the world because they've never had to present a working model.

Keep on going and the chances are you will stumble on something, perhaps when you are least expecting it. I have never heard of anyone stumbling on something sitting down.